Screen frame



FIG. 1 is a perspective view of a screen frame;

FIG. 2 is a front side view of the present design, in this instance, a rear side view is omitted because it is a mirror image of the front side view;

FIG. 3 is a left side view of the present design, in this instance, a right side view is omitted because it is symmetrical with the left side view;

FIG. 4 is a top view of the present design;

FIG. 5 is a bottom view of the present design; and,

FIG. 6 shows a state where the present design is shown in environment.

The broken lines depict environment and form no part of the claim. 

CLAIM The ornamental design for screen frame, as shown and described. 